 So the two green lights will be on to indicate your microphone is hot. And when they turn your microphone off, your lights will go off. So that way you can look down and see whether or not your mic is hot. And then they gave the example that if one individual was speaking and the other individual tried to interrupt, you wouldn't really be able to hear them. And they did this both directions, I guess, to try to show that they were being fair.